Sensor # Device Sensor
group
Sensor name/location Notes
32
33
34
35
36
37
38
39
40
Cross-zoning
Cross zoning (two-trip) refers to two different group 18 sensors that must be tripped
within two minutes of each other to report an alarm to the central station. Figure 2
below shows the path of a person walking from the kitchen to the living room. When
the person is detected walking through the kitchen, the motion sensor in the kitchen
is tripped, sounding a local alarm. If motion is detected by the living room motion
sensor within two minutes, an alarm report will be sent to the central station.
Figure 2: Cross-zone diagram
Motion sensor
Motion sensor
Path of person walking
Note: We do not recommend cross zoning for exit/entry zones. Each zone can
individually protect the intended area.
Simon XT Installation Manual 9